libfuse
fuse_kernel.h
1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
2 /*
3  This file defines the kernel interface of FUSE
4  Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
5 
6  This program can be distributed under the terms of the GNU GPL.
7  See the file COPYING.
8 
9  This -- and only this -- header file may also be distributed under
10  the terms of the BSD Licence as follows:
11 
12  Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
13 
14  Redistribution and use in source and binary forms, with or without
15  modification, are permitted provided that the following conditions
16  are met:
17  1. Redistributions of source code must retain the above copyright
18  notice, this list of conditions and the following disclaimer.
19  2. Redistributions in binary form must reproduce the above copyright
20  notice, this list of conditions and the following disclaimer in the
21  documentation and/or other materials provided with the distribution.
22 
23  THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
27  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  SUCH DAMAGE.
34 */
35 
36 /*
37  * This file defines the kernel interface of FUSE
38  *
39  * Protocol changelog:
40  *
41  * 7.9:
42  * - new fuse_getattr_in input argument of GETATTR
43  * - add lk_flags in fuse_lk_in
44  * - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
45  * - add blksize field to fuse_attr
46  * - add file flags field to fuse_read_in and fuse_write_in
47  * - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
48  *
49  * 7.10
50  * - add nonseekable open flag
51  *
52  * 7.11
53  * - add IOCTL message
54  * - add unsolicited notification support
55  * - add POLL message and NOTIFY_POLL notification
56  *
57  * 7.12
58  * - add umask flag to input argument of create, mknod and mkdir
59  * - add notification messages for invalidation of inodes and
60  * directory entries
61  *
62  * 7.13
63  * - make max number of background requests and congestion threshold
64  * tunables
65  *
66  * 7.14
67  * - add splice support to fuse device
68  *
69  * 7.15
70  * - add store notify
71  * - add retrieve notify
72  *
73  * 7.16
74  * - add BATCH_FORGET request
75  * - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
76  * fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
77  * - add FUSE_IOCTL_32BIT flag
78  *
79  * 7.17
80  * - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
81  *
82  * 7.18
83  * - add FUSE_IOCTL_DIR flag
84  * - add FUSE_NOTIFY_DELETE
85  *
86  * 7.19
87  * - add FUSE_FALLOCATE
88  *
89  * 7.20
90  * - add FUSE_AUTO_INVAL_DATA
91  *
92  * 7.21
93  * - add FUSE_READDIRPLUS
94  * - send the requested events in POLL request
95  *
96  * 7.22
97  * - add FUSE_ASYNC_DIO
98  *
99  * 7.23
100  * - add FUSE_WRITEBACK_CACHE
101  * - add time_gran to fuse_init_out
102  * - add reserved space to fuse_init_out
103  * - add FATTR_CTIME
104  * - add ctime and ctimensec to fuse_setattr_in
105  * - add FUSE_RENAME2 request
106  * - add FUSE_NO_OPEN_SUPPORT flag
107  *
108  * 7.24
109  * - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
110  *
111  * 7.25
112  * - add FUSE_PARALLEL_DIROPS
113  *
114  * 7.26
115  * - add FUSE_HANDLE_KILLPRIV
116  * - add FUSE_POSIX_ACL
117  *
118  * 7.27
119  * - add FUSE_ABORT_ERROR
120  *
121  * 7.28
122  * - add FUSE_COPY_FILE_RANGE
123  * - add FOPEN_CACHE_DIR
124  * - add FUSE_MAX_PAGES, add max_pages to init_out
125  * - add FUSE_CACHE_SYMLINKS
126  *
127  * 7.29
128  * - add FUSE_NO_OPENDIR_SUPPORT flag
129  *
130  * 7.30
131  * - add FUSE_EXPLICIT_INVAL_DATA
132  * - add FUSE_IOCTL_COMPAT_X32
133  *
134  * 7.31
135  * - add FUSE_WRITE_KILL_PRIV flag
136  */
137 
138 #ifndef _LINUX_FUSE_H
139 #define _LINUX_FUSE_H
140 
141 #ifdef __KERNEL__
142 #include <linux/types.h>
143 #else
144 #include <stdint.h>
145 #endif
146 
147 /*
148  * Version negotiation:
149  *
150  * Both the kernel and userspace send the version they support in the
151  * INIT request and reply respectively.
152  *
153  * If the major versions match then both shall use the smallest
154  * of the two minor versions for communication.
155  *
156  * If the kernel supports a larger major version, then userspace shall
157  * reply with the major version it supports, ignore the rest of the
158  * INIT message and expect a new INIT message from the kernel with a
159  * matching major version.
160  *
161  * If the library supports a larger major version, then it shall fall
162  * back to the major protocol version sent by the kernel for
163  * communication and reply with that major version (and an arbitrary
164  * supported minor version).
165  */
166 
168 #define FUSE_KERNEL_VERSION 7
169 
171 #define FUSE_KERNEL_MINOR_VERSION 31
172 
174 #define FUSE_ROOT_ID 1
175 
176 /* Make sure all structures are padded to 64bit boundary, so 32bit
177  userspace works under 64bit kernels */
178 
179 struct fuse_attr {
180  uint64_t ino;
181  uint64_t size;
182  uint64_t blocks;
183  uint64_t atime;
184  uint64_t mtime;
185  uint64_t ctime;
186  uint32_t atimensec;
187  uint32_t mtimensec;
188  uint32_t ctimensec;
189  uint32_t mode;
190  uint32_t nlink;
191  uint32_t uid;
192  uint32_t gid;
193  uint32_t rdev;
194  uint32_t blksize;
195  uint32_t padding;
196 };
197 
198 struct fuse_kstatfs {
199  uint64_t blocks;
200  uint64_t bfree;
201  uint64_t bavail;
202  uint64_t files;
203  uint64_t ffree;
204  uint32_t bsize;
205  uint32_t namelen;
206  uint32_t frsize;
207  uint32_t padding;
208  uint32_t spare[6];
209 };
210 
211 struct fuse_file_lock {
212  uint64_t start;
213  uint64_t end;
214  uint32_t type;
215  uint32_t pid; /* tgid */
216 };
217 
221 #define FATTR_MODE (1 << 0)
222 #define FATTR_UID (1 << 1)
223 #define FATTR_GID (1 << 2)
224 #define FATTR_SIZE (1 << 3)
225 #define FATTR_ATIME (1 << 4)
226 #define FATTR_MTIME (1 << 5)
227 #define FATTR_FH (1 << 6)
228 #define FATTR_ATIME_NOW (1 << 7)
229 #define FATTR_MTIME_NOW (1 << 8)
230 #define FATTR_LOCKOWNER (1 << 9)
231 #define FATTR_CTIME (1 << 10)
232 
243 #define FOPEN_DIRECT_IO (1 << 0)
244 #define FOPEN_KEEP_CACHE (1 << 1)
245 #define FOPEN_NONSEEKABLE (1 << 2)
246 #define FOPEN_CACHE_DIR (1 << 3)
247 #define FOPEN_STREAM (1 << 4)
248 #define FOPEN_NOFLUSH (1 << 5)
249 
280 #define FUSE_ASYNC_READ (1 << 0)
281 #define FUSE_POSIX_LOCKS (1 << 1)
282 #define FUSE_FILE_OPS (1 << 2)
283 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
284 #define FUSE_EXPORT_SUPPORT (1 << 4)
285 #define FUSE_BIG_WRITES (1 << 5)
286 #define FUSE_DONT_MASK (1 << 6)
287 #define FUSE_SPLICE_WRITE (1 << 7)
288 #define FUSE_SPLICE_MOVE (1 << 8)
289 #define FUSE_SPLICE_READ (1 << 9)
290 #define FUSE_FLOCK_LOCKS (1 << 10)
291 #define FUSE_HAS_IOCTL_DIR (1 << 11)
292 #define FUSE_AUTO_INVAL_DATA (1 << 12)
293 #define FUSE_DO_READDIRPLUS (1 << 13)
294 #define FUSE_READDIRPLUS_AUTO (1 << 14)
295 #define FUSE_ASYNC_DIO (1 << 15)
296 #define FUSE_WRITEBACK_CACHE (1 << 16)
297 #define FUSE_NO_OPEN_SUPPORT (1 << 17)
298 #define FUSE_PARALLEL_DIROPS (1 << 18)
299 #define FUSE_HANDLE_KILLPRIV (1 << 19)
300 #define FUSE_POSIX_ACL (1 << 20)
301 #define FUSE_ABORT_ERROR (1 << 21)
302 #define FUSE_MAX_PAGES (1 << 22)
303 #define FUSE_CACHE_SYMLINKS (1 << 23)
304 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
305 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
306 #define FUSE_MAP_ALIGNMENT (1 << 26)
307 #define FUSE_SUBMOUNTS (1 << 27)
308 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
309 #define FUSE_SETXATTR_EXT (1 << 29)
310 #define FUSE_INIT_EXT (1 << 30)
311 #define FUSE_INIT_RESERVED (1 << 31)
312 /* bits 32..63 get shifted down 32 bits into the flags2 field */
313 #define FUSE_SECURITY_CTX (1ULL << 32)
314 #define FUSE_HAS_INODE_DAX (1ULL << 33)
315 
321 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
322 
326 #define FUSE_RELEASE_FLUSH (1 << 0)
327 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1)
328 
332 #define FUSE_GETATTR_FH (1 << 0)
333 
337 #define FUSE_LK_FLOCK (1 << 0)
338 
346 #define FUSE_WRITE_CACHE (1 << 0)
347 #define FUSE_WRITE_LOCKOWNER (1 << 1)
348 #define FUSE_WRITE_KILL_PRIV (1 << 2)
349 
353 #define FUSE_READ_LOCKOWNER (1 << 1)
354 
367 #define FUSE_IOCTL_COMPAT (1 << 0)
368 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
369 #define FUSE_IOCTL_RETRY (1 << 2)
370 #define FUSE_IOCTL_32BIT (1 << 3)
371 #define FUSE_IOCTL_DIR (1 << 4)
372 #define FUSE_IOCTL_COMPAT_X32 (1 << 5)
373 
374 #define FUSE_IOCTL_MAX_IOV 256
375 
381 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
382 
388 #define FUSE_FSYNC_FDATASYNC (1 << 0)
389 
390 enum fuse_opcode {
391  FUSE_LOOKUP = 1,
392  FUSE_FORGET = 2, /* no reply */
393  FUSE_GETATTR = 3,
394  FUSE_SETATTR = 4,
395  FUSE_READLINK = 5,
396  FUSE_SYMLINK = 6,
397  FUSE_MKNOD = 8,
398  FUSE_MKDIR = 9,
399  FUSE_UNLINK = 10,
400  FUSE_RMDIR = 11,
401  FUSE_RENAME = 12,
402  FUSE_LINK = 13,
403  FUSE_OPEN = 14,
404  FUSE_READ = 15,
405  FUSE_WRITE = 16,
406  FUSE_STATFS = 17,
407  FUSE_RELEASE = 18,
408  FUSE_FSYNC = 20,
409  FUSE_SETXATTR = 21,
410  FUSE_GETXATTR = 22,
411  FUSE_LISTXATTR = 23,
412  FUSE_REMOVEXATTR = 24,
413  FUSE_FLUSH = 25,
414  FUSE_INIT = 26,
415  FUSE_OPENDIR = 27,
416  FUSE_READDIR = 28,
417  FUSE_RELEASEDIR = 29,
418  FUSE_FSYNCDIR = 30,
419  FUSE_GETLK = 31,
420  FUSE_SETLK = 32,
421  FUSE_SETLKW = 33,
422  FUSE_ACCESS = 34,
423  FUSE_CREATE = 35,
424  FUSE_INTERRUPT = 36,
425  FUSE_BMAP = 37,
426  FUSE_DESTROY = 38,
427  FUSE_IOCTL = 39,
428  FUSE_POLL = 40,
429  FUSE_NOTIFY_REPLY = 41,
430  FUSE_BATCH_FORGET = 42,
431  FUSE_FALLOCATE = 43,
432  FUSE_READDIRPLUS = 44,
433  FUSE_RENAME2 = 45,
434  FUSE_LSEEK = 46,
435  FUSE_COPY_FILE_RANGE = 47,
436 
437  /* CUSE specific operations */
438  CUSE_INIT = 4096
439 };
440 
441 enum fuse_notify_code {
442  FUSE_NOTIFY_POLL = 1,
443  FUSE_NOTIFY_INVAL_INODE = 2,
444  FUSE_NOTIFY_INVAL_ENTRY = 3,
445  FUSE_NOTIFY_STORE = 4,
446  FUSE_NOTIFY_RETRIEVE = 5,
447  FUSE_NOTIFY_DELETE = 6,
448  FUSE_NOTIFY_CODE_MAX
449 };
450 
451 /* The read buffer is required to be at least 8k, but may be much larger */
452 #define FUSE_MIN_READ_BUFFER 8192
453 
454 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
455 
456 struct fuse_entry_out {
457  uint64_t nodeid; /* Inode ID */
458  uint64_t generation; /* Inode generation: nodeid:gen must
459  be unique for the fs's lifetime */
460  uint64_t entry_valid; /* Cache timeout for the name */
461  uint64_t attr_valid; /* Cache timeout for the attributes */
462  uint32_t entry_valid_nsec;
463  uint32_t attr_valid_nsec;
464  struct fuse_attr attr;
465 };
466 
467 struct fuse_forget_in {
468  uint64_t nlookup;
469 };
470 
471 struct fuse_forget_one {
472  uint64_t nodeid;
473  uint64_t nlookup;
474 };
475 
476 struct fuse_batch_forget_in {
477  uint32_t count;
478  uint32_t dummy;
479 };
480 
481 struct fuse_getattr_in {
482  uint32_t getattr_flags;
483  uint32_t dummy;
484  uint64_t fh;
485 };
486 
487 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
488 
489 struct fuse_attr_out {
490  uint64_t attr_valid; /* Cache timeout for the attributes */
491  uint32_t attr_valid_nsec;
492  uint32_t dummy;
493  struct fuse_attr attr;
494 };
495 
496 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
497 
498 struct fuse_mknod_in {
499  uint32_t mode;
500  uint32_t rdev;
501  uint32_t umask;
502  uint32_t padding;
503 };
504 
505 struct fuse_mkdir_in {
506  uint32_t mode;
507  uint32_t umask;
508 };
509 
510 struct fuse_rename_in {
511  uint64_t newdir;
512 };
513 
514 struct fuse_rename2_in {
515  uint64_t newdir;
516  uint32_t flags;
517  uint32_t padding;
518 };
519 
520 struct fuse_link_in {
521  uint64_t oldnodeid;
522 };
523 
524 struct fuse_setattr_in {
525  uint32_t valid;
526  uint32_t padding;
527  uint64_t fh;
528  uint64_t size;
529  uint64_t lock_owner;
530  uint64_t atime;
531  uint64_t mtime;
532  uint64_t ctime;
533  uint32_t atimensec;
534  uint32_t mtimensec;
535  uint32_t ctimensec;
536  uint32_t mode;
537  uint32_t unused4;
538  uint32_t uid;
539  uint32_t gid;
540  uint32_t unused5;
541 };
542 
543 struct fuse_open_in {
544  uint32_t flags;
545  uint32_t unused;
546 };
547 
548 struct fuse_create_in {
549  uint32_t flags;
550  uint32_t mode;
551  uint32_t umask;
552  uint32_t padding;
553 };
554 
555 struct fuse_open_out {
556  uint64_t fh;
557  uint32_t open_flags;
558  uint32_t padding;
559 };
560 
561 struct fuse_release_in {
562  uint64_t fh;
563  uint32_t flags;
564  uint32_t release_flags;
565  uint64_t lock_owner;
566 };
567 
568 struct fuse_flush_in {
569  uint64_t fh;
570  uint32_t unused;
571  uint32_t padding;
572  uint64_t lock_owner;
573 };
574 
575 struct fuse_read_in {
576  uint64_t fh;
577  uint64_t offset;
578  uint32_t size;
579  uint32_t read_flags;
580  uint64_t lock_owner;
581  uint32_t flags;
582  uint32_t padding;
583 };
584 
585 #define FUSE_COMPAT_WRITE_IN_SIZE 24
586 
587 struct fuse_write_in {
588  uint64_t fh;
589  uint64_t offset;
590  uint32_t size;
591  uint32_t write_flags;
592  uint64_t lock_owner;
593  uint32_t flags;
594  uint32_t padding;
595 };
596 
597 struct fuse_write_out {
598  uint32_t size;
599  uint32_t padding;
600 };
601 
602 #define FUSE_COMPAT_STATFS_SIZE 48
603 
604 struct fuse_statfs_out {
605  struct fuse_kstatfs st;
606 };
607 
608 struct fuse_fsync_in {
609  uint64_t fh;
610  uint32_t fsync_flags;
611  uint32_t padding;
612 };
613 
614 struct fuse_setxattr_in {
615  uint32_t size;
616  uint32_t flags;
617 };
618 
619 struct fuse_getxattr_in {
620  uint32_t size;
621  uint32_t padding;
622 };
623 
624 struct fuse_getxattr_out {
625  uint32_t size;
626  uint32_t padding;
627 };
628 
629 struct fuse_lk_in {
630  uint64_t fh;
631  uint64_t owner;
632  struct fuse_file_lock lk;
633  uint32_t lk_flags;
634  uint32_t padding;
635 };
636 
637 struct fuse_lk_out {
638  struct fuse_file_lock lk;
639 };
640 
641 struct fuse_access_in {
642  uint32_t mask;
643  uint32_t padding;
644 };
645 
646 struct fuse_init_in {
647  uint32_t major;
648  uint32_t minor;
649  uint32_t max_readahead;
650  uint32_t flags;
651  uint32_t flags2;
652  uint32_t unused[11];
653 };
654 
655 #define FUSE_COMPAT_INIT_OUT_SIZE 8
656 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
657 
658 struct fuse_init_out {
659  uint32_t major;
660  uint32_t minor;
661  uint32_t max_readahead;
662  uint32_t flags;
663  uint16_t max_background;
664  uint16_t congestion_threshold;
665  uint32_t max_write;
666  uint32_t time_gran;
667  uint16_t max_pages;
668  uint16_t map_alignment;
669  uint32_t flags2;
670  uint32_t unused[7];
671 };
672 
673 #define CUSE_INIT_INFO_MAX 4096
674 
675 struct cuse_init_in {
676  uint32_t major;
677  uint32_t minor;
678  uint32_t unused;
679  uint32_t flags;
680 };
681 
682 struct cuse_init_out {
683  uint32_t major;
684  uint32_t minor;
685  uint32_t unused;
686  uint32_t flags;
687  uint32_t max_read;
688  uint32_t max_write;
689  uint32_t dev_major; /* chardev major */
690  uint32_t dev_minor; /* chardev minor */
691  uint32_t spare[10];
692 };
693 
694 struct fuse_interrupt_in {
695  uint64_t unique;
696 };
697 
698 struct fuse_bmap_in {
699  uint64_t block;
700  uint32_t blocksize;
701  uint32_t padding;
702 };
703 
704 struct fuse_bmap_out {
705  uint64_t block;
706 };
707 
708 struct fuse_ioctl_in {
709  uint64_t fh;
710  uint32_t flags;
711  uint32_t cmd;
712  uint64_t arg;
713  uint32_t in_size;
714  uint32_t out_size;
715 };
716 
717 struct fuse_ioctl_iovec {
718  uint64_t base;
719  uint64_t len;
720 };
721 
722 struct fuse_ioctl_out {
723  int32_t result;
724  uint32_t flags;
725  uint32_t in_iovs;
726  uint32_t out_iovs;
727 };
728 
729 struct fuse_poll_in {
730  uint64_t fh;
731  uint64_t kh;
732  uint32_t flags;
733  uint32_t events;
734 };
735 
736 struct fuse_poll_out {
737  uint32_t revents;
738  uint32_t padding;
739 };
740 
741 struct fuse_notify_poll_wakeup_out {
742  uint64_t kh;
743 };
744 
745 struct fuse_fallocate_in {
746  uint64_t fh;
747  uint64_t offset;
748  uint64_t length;
749  uint32_t mode;
750  uint32_t padding;
751 };
752 
753 struct fuse_in_header {
754  uint32_t len;
755  uint32_t opcode;
756  uint64_t unique;
757  uint64_t nodeid;
758  uint32_t uid;
759  uint32_t gid;
760  uint32_t pid;
761  uint32_t padding;
762 };
763 
764 struct fuse_out_header {
765  uint32_t len;
766  int32_t error;
767  uint64_t unique;
768 };
769 
770 struct fuse_dirent {
771  uint64_t ino;
772  uint64_t off;
773  uint32_t namelen;
774  uint32_t type;
775  char name[];
776 };
777 
778 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
779 #define FUSE_DIRENT_ALIGN(x) \
780  (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
781 #define FUSE_DIRENT_SIZE(d) \
782  FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
783 
784 struct fuse_direntplus {
785  struct fuse_entry_out entry_out;
786  struct fuse_dirent dirent;
787 };
788 
789 #define FUSE_NAME_OFFSET_DIRENTPLUS \
790  offsetof(struct fuse_direntplus, dirent.name)
791 #define FUSE_DIRENTPLUS_SIZE(d) \
792  FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
793 
794 struct fuse_notify_inval_inode_out {
795  uint64_t ino;
796  int64_t off;
797  int64_t len;
798 };
799 
800 struct fuse_notify_inval_entry_out {
801  uint64_t parent;
802  uint32_t namelen;
803  uint32_t padding;
804 };
805 
806 struct fuse_notify_delete_out {
807  uint64_t parent;
808  uint64_t child;
809  uint32_t namelen;
810  uint32_t padding;
811 };
812 
813 struct fuse_notify_store_out {
814  uint64_t nodeid;
815  uint64_t offset;
816  uint32_t size;
817  uint32_t padding;
818 };
819 
820 struct fuse_notify_retrieve_out {
821  uint64_t notify_unique;
822  uint64_t nodeid;
823  uint64_t offset;
824  uint32_t size;
825  uint32_t padding;
826 };
827 
828 /* Matches the size of fuse_write_in */
829 struct fuse_notify_retrieve_in {
830  uint64_t dummy1;
831  uint64_t offset;
832  uint32_t size;
833  uint32_t dummy2;
834  uint64_t dummy3;
835  uint64_t dummy4;
836 };
837 
838 /* Device ioctls: */
839 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t)
840 
841 struct fuse_lseek_in {
842  uint64_t fh;
843  uint64_t offset;
844  uint32_t whence;
845  uint32_t padding;
846 };
847 
848 struct fuse_lseek_out {
849  uint64_t offset;
850 };
851 
852 struct fuse_copy_file_range_in {
853  uint64_t fh_in;
854  uint64_t off_in;
855  uint64_t nodeid_out;
856  uint64_t fh_out;
857  uint64_t off_out;
858  uint64_t len;
859  uint64_t flags;
860 };
861 
862 #endif /* _LINUX_FUSE_H */